Qhov kub siab tshaj plaws rau ASTM A202 Qib B yog dab tsi?
Qhov siab tshaj plaws pom zoo ua haujlwm kub rauASTM A202 Qib B Chromium-Manganese-Silicon (Cr-Mn-Si) steel daim hlau, feem ntau siv hauv cov hlab ntsha siab, yog kwv yees li410∘C ( 770∘F )Raws li MakeItFrom.com. Thaum melting tshwm sim ntau dua, qhov no 410 degreetxwv yog txhais rau cov txheej txheem kev ruaj ntseg hauv siab -kub siv.
ASTM A202 Qib B yog qhov siab - tensile alloy steel phaj npaj rau siv hauv kev tsim cov boilers thiab lwm cov hlab ntsha siab uas txo qhov hnyav los ntawm kev cia siab dua yog qhov tseem ceeb. Los ntawm kev sib koom ua ke ntawm Silicon thiab Manganese ua qhov tseem ceeb ntxiv nrog rau Chromium, cov khoom ua tiav cov txiaj ntsig siab - rau - tensile ratio. Qhov no tso cai rau cov engineers tsim cov ciam teb siab dua piv rau cov pa steels. Txawm hais tias nws cov koob meej tau ploj mus vim qhov tshwm sim ntawm Chrome tshwj xeeb dua-Moly steels, A202 Qib B tseem tau lees paub rau nws cov keeb kwm tseem ceeb hauv kev txuas qhov sib txawv ntawm carbon steel thiab siab - alloy cov ntaub ntawv hauv cov ntawv thov engineering hnyav.
Cov yam ntxwv tseem ceeb
High Yield Point:Muab cov txiaj ntsig yam tsawg kawg nkaus ntawm 47 ksi, ntau tshaj cov qib carbon steel ntau.
Silicon Strengthening:High Silicon qib txhim kho cov kev txwv elastic thiab muab kev tiv thaiv ntxiv rau siab -siab zog.
Los ntawm -Thickness Uniformity:Qhov sib npaug ntawm alloy tso cai rau cov khoom siv kho kom zoo ib yam txawm tias nyob hauv cov phaj tuab.
Brinell Hardness:Feem ntau nthuav tawm cov tawv tawv dua, muab kev tiv thaiv zoo dua rau kev hnav thiab yaig.
Qib Qib
ASTM:American Society for Testing and Materials.
A:Cov khoom siv ferrous.
202:Txheem rau Cr-Mn-Si alloy daim hlau.
Qib B:Kev faib tawm ntau zog.
Kev sib piv (vs. ASTM A202 Qib A)
Tensile Limit:Qib B (85--105 ksi) muaj zog dua qib A (75--95 ksi).
Yield Requirement:Qib B xav tau 47 ksi yam tsawg kawg nkaus; Qib A yuav tsum tau 45 ksi.
Cov ntsiab lus carbon:Qib B feem ntau tso cai rau cov pa roj carbon ntau dua me ntsis kom ua tiav nws lub zog zoo dua.
Tsim Kev Nyuaj Siab:Qib B tso cai rau cov txiaj ntsig kev ntxhov siab ntau dua hauv ASME Tshooj VIII tsim kev suav.
Daim Ntawv Thov Kev Sib Tham
Petrochemical Reactors:Cov hlab ntsha keeb kwm siv rau siab -kev siv tshuaj lom neeg siab.
Locomotive Boilers:Tshwj xeeb boiler daim hlau rau chav cav uas xav tau lub zog siab - rau - qhov hnyav piv.
Pressure Storage Bullets:Loj - lub tank muaj peev xwm khaws cia cov roj av ntawm kev kub siab.
Forging Tuag Blocks:Qee zaum siv nyob rau hauv lub xeev annealed rau hnyav -lub luag hauj lwm industrial forming cuab yeej.
Refinery Fractionating Ntauwd:Txhawb cov plhaub rau cov pej thuam siab uas muaj cua daj cua dub siab thiab sab hauv siab.
Dab tsi yog qhov cuam tshuam toughness ntawm ASTM A202 Qib B?
Covcuam tshuam toughnessntawmASTM A202 Qib Bfeem ntau yog tsim nyog rau feem ntau nruab nrab mus rau siab - kev siv siab. Thaum nws muaj qhov toughness zoo ntawm qhov kub thiab txias, nws tsis pom zoo raulow-kub sivqhov twg cov khoom yuav ua nkig. Rau ib puag ncig cryogenic los yog tsis tshua muaj kub, lwm yam alloys nyiamASTM A537 Cov Lus Qhia Tshwj Xeebtej zaum yuav haum dua vim lawv superiorcuam tshuam tsis kamnyob rau hauv txias txias.
Dab tsi yog qhov kev xa khoom rau ASTM A202 Qib B?
ASTM A202 Qib B chromium-manganese- silicon alloy steel daim hlau feem ntau muab nkag rau hauvraws li - yobmob. Lawv kuj tuaj yeem raug txiav txim rau hauv qhov qub lossis kev ntxhov siab-txoj kev mob, lossis ob qho tib si. Cov phaj no yog tsim los rau welded boilers thiab cov hlab ntsha siab.
Puas yog ASTM A202 Qib B haum rau siab -kev siv kub?
Yog lawm,ASTM A202 Qib Byog tsim los ua tau zoo hauv qabsiab -qhov kub thiab txias, ua kom haum raucov hlab ntsha siabthiabboilersraug rau qhov kub siab. Kev suav nrogchromiumthiabmolybdenumnyob rau hauv lub alloy txhim kho nwscreep kujthiab txhim kho nwszogntawm qhov kub siab, feem ntau mus txog ib ncig800℃F (427 degree). Qhov no ua rau nws zoo tagnrho rautsim hluav taws xobthiabchemical ua.
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A202 Qib BTshuaj muaj pes tsawg leeg |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
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A202 Qib B |
0.25 |
0.54-0.90 |
0.97-1.52 |
0.035 |
0.035 |
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Qib |
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A202 Qib BMechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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A202 Qib B |
mm |
Min Mpa |
Mpa |
Tsawg% |
|
6-50 |
325 |
587-760 |
18% |
|
|
50-100 |
325 |
587-760 |
15% |
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Sib npaug steel qib A202 Qib B |
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Teb chaws Europe |
Belgium |
Lub teb chaws Yelemees |
Fabkis |
Ltalis |
Sweden |
Is Nrias teb |
Nyiv |
|
|
|
E 315 |
18 MD 4.05 Nws |
16 hmo 6 |
22.16.04 |
|
450M |
1 Cov tshuaj muaj pes tsawg leeg ntawm ASTM A202 Qib B yog dab tsi?
Covtshuaj muaj pes tsawg leegntawmASTM A202 Qib Bfeem ntau suav nrogCov pa roj carbon (0.18-0.22%), Manganese (0.60-0.90%), Silicon (0.15-0.30%), Chromium (0.90-1.20%), Molybdenum (0.30-0.60%), Phosphorus(tsawg dua lossis sib npaug li 0.035%), thiabSulfur(tsawg dua lossis sib npaug li 0.035%). Cov ntsiab lus no muab cov hlau nws xav tauzog, tawv, thiabtiv thaiv corrosionthaum kom ntseeg tau tias nws tuaj yeem ua haujlwm siab -siab thiab siab- cov ntawv thov kub zoo li cov uas pom hauvcov hlab ntsha siabthiabboilers.
2 Lub zog ntawm ASTM A202 Qib B yog dab tsi?
Covyield zogntawmASTM A202 Qib Byog feem ntau50 ksi (345 MPa). Qhov no txhais tau hais tias cov khoom siv tuaj yeem tiv taus kev ntxhov siab txog qib no yam tsis muaj deformation mus tas li. Covyield zog, nrog nwstensile zogthiabtawv, xyuas kom meej tiasASTM A202 Qib Byog haum raulub nkoj siabkev siv qhov twg mechanical loads thiab thermal stresses tseem ceeb, tshwj xeeb tshaj yog nyob rau hauvboilersthiabkub exchangers.
3 Dab tsi yog qhov nyuaj ntawm ASTM A202 Qib B?
CovtawvntawmASTM A202 Qib Bfeem ntau ntog ntawm190-250 HB(Brinell hardness scale), nyob ntawm seb qhov kev kho cua sov tshwj xeeb thiab kev ua haujlwm. Covtawvxyuas kom cov khoom tuaj yeem tiv taushnavthiabpuashauv kev siv lub nkoj siab. Txawm li cas los xij, rau cov ntaub ntawv raughnyav hnyav hnyav, yuav tsum muaj hardness siab dua alloy, nyob ntawm seb cov kev xav tau tshwj xeeb ntawm daim ntawv thov.
4 Cov kev lag luam twg siv ASTM A202 Qib B?
ASTM A202 Qib Byog dav siv nyob rau hauv kev lag luam xav tau cov ntaub ntawv nrog zoozogthiabthermal tsis kamnyob rau hauv siab -xwm txheej. Cov kev lag luam no suav nrogtsim hluav taws xob, chemical ua, thiabpetrochemicalkev lag luam. Nws yog feem ntau siv nyob rau hauvcov hlab ntsha siab, kub exchangers, thiabboilersqhov twgtsis kam mus rau qhov kub thiab txiasthiabcorrosion kujyog qhov tseem ceeb rau lub sijhawm ntev - kev ntseeg siab thiab kev nyab xeeb hauv cov ntawv thov.
5 Dab tsi yog qhov ntsuas kub siab tshaj plaws rau ASTM A202 Qib B?
ASTM A202 Qib Byog tsim los ua tau zoo hauv qabsiab -qhov kub thiab txias, ua kom haum raucov hlab ntsha siabthiabboilersraug rau qhov kub siab. Kev suav nrogchromiumthiabmolybdenumnyob rau hauv lub alloy txhim kho nwscreep kujthiab txhim kho nwszogntawm qhov kub siab, feem ntau mus txog ib ncig800℃F (427 degree). Qhov no ua rau nws zoo tagnrho rautsim hluav taws xobthiabchemical ua.
6 Lub peev xwm vuam ntawm ASTM A202 Qib B yog dab tsi?
ASTM A202 Qib Bmuaj zooweldability, tso cai rau nws yuav tsum tau welded siv ntau txoj kev zoo lishielded hlau arc vuam (SMAW), Gas tungsten arc vuam (GTAW), thiabSubmerged arc vuam (SAW). Txawm li cas los xij, vim nwssiab carbon cov ntsiab lus, preheatingthiabpost-weld kev kho cua sov (PWHT)raug pom zoo kom tsis txhob tawg thiab xyuas kom meej ntawm cov pob qij txha welded, tshwj xeeb tshaj yog rauntu tuabhauv kev tsim cov hlab ntsha siab.
7 Lub zog tensile ntawm ASTM A202 Qib B yog dab tsi?
Covtensile zogntawmASTM A202 Qib Bqhov nruab nrab ntawm70 ksi rau 90 ksi (485 ~ 620 MPa). Qib ntawm tensile lub zog no tso cai rau cov khoom siv los tiv thaiv cov neeg kho tshuab kev ntxhov siab nyob rau hauvsiab -siabib puag ncig. Lub zog, ua ke nrog nwsweldabilitythiabtawv, uaASTM A202 Qib Bhaum rau kev siv hauvcov hlab ntsha siabthiabboilers, tshwj xeeb tshaj yog nyob rau hauv kev lag luam xws lichemical uathiabtsim hluav taws xob.
Tau txais cov lus muaj nuj nqis rau ASTM A202 Qib B, Hu rau GNEE Steel
